Exactly one of these five numbers is a square number. Which one?
a) 99,999,999 b) 123,333,333 c) 649,485,225 d) 713,291,035 e) 987,654,000
N is a three-digit number. The digits of N can be swapped to give five new numbers. If we add these five numbers, we get 2022. What is the value of N ?
Which of the five black shapes is identical to the red one? There may be more than one which is exactly the same.
